Electron Dynamics in a Coupled Quantum Point Contact Structure with a Local Magnetic Moment

TL;DR

This paper presents a theoretical model for electron dynamics in coupled quantum wires with a local magnetic moment, accurately reproducing experimental conductance features.

Contribution

It introduces a detailed single-particle Hamiltonian considering geometry and scattering, providing new insights into electron behavior in such structures.

Findings

Transmission coefficient matches experimental data

Conductance features are accurately reproduced

Model captures effects of local magnetic moments on electron transport

Abstract

We develop a theoretical model for the description of electron dynamics in coupled quantum wires when the local magnetic moment is formed in one of the wires. We employ a single-particle Hamiltonian that takes account of the specific geometry of potentials defining the structure as well as electron scattering on the local magnetic moment. The equations for the wave functions in both wires are derived and the approach for their solution is discussed. We determine the transmission coefficient and conductance of the wire having the local magnetic moment and show that our description reproduces the experimentally observed features.